Finding the Fourth Proportional to 23,501.71, 32,431.71 and 13,428.55

Step by Step Solution

1. Step 1: Write the proportion equation
   23,501.71 : 32,431.71 = 13,428.55 : x
2. Step 2: Convert to fraction form
   23,501.71/32,431.71 = 13,428.55/x
3. Step 3: Cross multiply
   23,501.71x = 32,431.71 × 13,428.55
4. Step 4: Simplify right side
   23,501.71x = 435,510,839.32
5. Step 5: Solve for x
   x = 435,510,839.32/23,501.71
6. Step 6: Final answer
   x = 18,531.03